This review is for an older version of this product
I'm really surprised to hear of the problems people have had with this tester. I was just about to buy one for a friend, because I find mine so invaluable, when I saw the low star-rating, and thought I'd better redress the balance. Mine has worked perfectly from day one, and I've had it for years. I have looked after it & not put it in the dishwasher, mind you. Have Lakeland changed their supplier maybe? Or has the supplier perhaps changed the manufacturing spec over the years? Could be worth checking out, to see if this is the problem.